Practical Peripherals 5624US 16-Bit ISA Voice Fax Modem Card w/ Audio Ports

Practical Peripherals 5624US 16-Bit ISA Voice Fax Modem Card w/ Audio Ports

The Practical Peripherals 5624US is a 16-bit ISA internal modem card combining voice, fax, and data capabilities in a single expansion card. It installs into any standard 16-bit ISA slot and provides two RJ-11 telephone jacks (Line and Phone) along with 3.5mm audio input and output ports on the bracket, enabling voice modem features such as answering machine and speakerphone functions through the host PC.

Specifications & What's Included

• Brand: Practical Peripherals
• Model: 5624US
• Board Part Number: 09-00451-3
• Bus Interface: 16-bit ISA (Industry Standard Architecture)
• Modem Type: Voice / Fax / Data internal modem
• Bracket Connectors: 2x RJ-11 (Line and Phone), 2x 3.5mm audio jacks (in/out)
• FCC ID: DUP5624US
• FCC Part 68: DUPUSA-23918-PT-E
• DOC Load #: 7
• REN: 0.5B
• Certifications: UL Listed, CSA Certified, FCC Part 68
• Includes: Card only — no driver software or manual included

Applications

The Practical Peripherals 5624US was designed for late 1990s ISA-bus desktop PCs running operating systems such as Windows 95, Windows 98, and MS-DOS. ISA internal modems of this type were standard equipment in home and small-business computers of that era, providing dial-up internet access, fax transmission and reception, and voice modem features through a single card. The ISA bus was the dominant expansion interface in PCs from the mid-1980s through the late 1990s, before PCI modems took over; cards like this were phased out as ISA slots disappeared from motherboards around 1999–2002. Today the 5624US is sought by vintage PC enthusiasts, collectors, and technicians maintaining period-correct ISA-slot systems — including 486 and early Pentium machines — where a PCI modem cannot be used. The card's integrated audio ports made it a cost-effective all-in-one solution for voice modem applications without requiring a separate sound card for those functions.